Bill, he was it, the Scientific American Boy, I mean. Of course, we were all American boys and pretty scientific chaps too, if I do say it myself, but Bill, well he was the whole show. What he didn't know wasn't worth knowing, so we all thought, and even to this day Isometimes wonder how he managed to contrive and execute so many remarkable plans. At the same time he was not a conceited sort of a chap and didn't seem to realize that he was head and shoulders above the rest of us in ingenuity. But, of course, we didn't all have an uncle like Bill did. Bill's Uncle Ed was one of those rare men who take a great interest in boys and their affairs, a man who took time to answer every question put to him, explaining everything completely and yet so clearly that you caught on at once. Uncle Ed (we all called him that) was a civil engineer of very high standing in his profession, which had taken him pretty much all over the world, and his naturally inquisitive nature, coupled with a wonderful memory, had made him a veritable walking encyclopedia. With such an uncle it is no wonder that Bill knew everything. Of course, there were some things that puzzled even Bill. But all such difficulties, after a reasonable amount of brain-work had failed to clear them, were submitted to Uncle Ed. Uncle Ed was always prompt (that was one thing we liked about him), and no matter where he was or what he was doing he would drop everything to answer a letter from the society.